• Denial of Service (DoS)

– an attempt to make one or more services on a server unavailable by generating too many requests or by consumption of other server resources

– blocking normal functioning of a whole ISP infrastructure or part of it and its servers, generating a large number of IP packets from multiple sources. The attacks were carried out by DDoS tools from an infrastructure which consists of many compromised computers

• Computer compromise

– successful installation of malware

– successful unauthorized access to a computer

– unauthorized use of a computer

– unauthorized change of user information

• Unwanted network activities

– it implies to all types of unwanted network activities for discovering (scan) of networks and network services, which were initiated by a third person using scan tools

• Spam

– spam sending over compromised computers

– placing of spam URLs which are registered in original spam messages on servers

• Phishing

– phishing attack where at least one computer from Croatia is involved as an attacker or victim

– phishing attack which uses a compromised host from Croatia

• Other types of malicious attacks

– it implies to the rest types of attacks or frauds where at least one computer from Croatia is involved as an attacker or victim.